
Rotative Steam Engine by Boulton and Watt, 1788
1788
1788
1794
1787
hallmarked 1788
1791
1786
1787
1790
1794
1792
1795
1795
1790
1795
1795
1790
1792
1792
1790
2000-100 BCE
1790
1790
1772 (original); 1919 (model)
1792
1990-96
1791-1792
circa 1795
1794
1787
1705-1737
1791
1788
1791
1790-1794
1795
1787
4000-2001 BCE
1789-1795
1793
1794-03-03
1795
1790-1793
1850-1899
1791
1789
1774; 1923
1790-1794
1642-1649 (original); 1883 (model)
2000-100 BCE
30